Acoustic Holography of the Solar Convection Zone with GONG Data

Braun，道格拉斯，“用GONG数据对太阳对流区的声全息术“AST-9987286在这项研究中，地震全息术的原理被用来发展一种表征和成像太阳活动区的声学特性的方法。 将利用全球振荡网络小组收集的观测资料，对太阳进行广泛的地震勘测，以便对太阳黑子、谱斑、大型活动区复合体和孔隙的相位对比图像进行编目。 从这个一般模型的所谓的“声护城河”将被设计，以确定其热和对流特性，以及这种现象在太阳黑子及其周围的热量传输中发挥的作用。 利用长波长振荡模式，该方法将进一步应用于太阳内部的深度成像。 将这一技术扩展到对太阳远侧表面成像，可能为一个重要的新的“空间天气”预警系统提供基础。 大规模的太阳爆发或耀斑可能会对航天器、通信系统和地球上的电网造成严重损害。 太阳的远侧图像可以提前一周或更长时间识别潜在的危险情况。该项目的资金由美国国家科学基金会恒星天文学天体物理学计划（AST/SAA）提供。

ABSTRACTBraun, Douglas"Acoustic Holography of the Solar Convection Zone with GONG Data"AST-9987286In this research the principles of seismic holography are being used to develop a method of characterizing and imaging the acoustic properties of solar active regions. Using observations collected by the Global Oscillations Network Group (GONG) a broad seismic survey of the Sun will be conducted in order to catalog phase-contrast images of sunspots, plages, large active region complexes and pores. From this a general model of so-called 'acoustic moats' will be devised in order to determine their thermal and convective properties, and the role such phenomena play in the transport of heat in and around sunspots. Using the long-wavelength modes of oscillation, the method will be further applied to deep imaging of the solar interior. Extension of this technique to imaging the solar farside surface may provide the basis for an important new 'space weather' early warning system. Large solar outbursts, or flares, may cause serious damage to spacecraft, communications systems and electric power grids on Earth. Far side images of the Sun may identify potentially dangerous conditions a week or more in advance.Funding for this project was provided by the NSF program for Stellar Astronomy & Astrophysics (AST/SAA).